Merge branch '466178-try-out-the-new-gitaly-rpc-again' into 'master'

Add support for diff_blobs streaming for RapidDiffs

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/162171



Merged-by: Kerri Miller <kerrizor@kerrizor.com>
Approved-by: Kerri Miller <kerrizor@kerrizor.com>
Reviewed-by: Kerri Miller <kerrizor@kerrizor.com>
Reviewed-by: Patrick Bajao <ebajao@gitlab.com>
Reviewed-by: Sincheol (David) Kim <dkim@gitlab.com>
Reviewed-by: Duo Code Reviewer <duo-code-review-bot@gitlab.com>
Co-authored-by: David Kim <dkim@gitlab.com>